Anonymous...

Understanding Anonymous. We Are Legion: The Story of the Hacktivists. 2tJJ2.jpeg (Image JPEG, 1280x1811 pixels)
Your Anon News. Anonymous Threatens Massive WikiLeaks-Style Exposure, Announced On Hacked Gov Site. Hacktivist organization, Anonymous, is threatening perhaps their biggest play ever: a massive WikiLeaks-style exposure of sensitive U.S. government secrets.

As proof of their power, they announced details of the plan on hacked government website, the United States Sentencing Commission (USSC.gov). Citing the recent death of free information activist Aaron Swartz, they explain, “With Aaron’s death we can wait no longer. The time has come to show the United States Department of Justice and its affiliates the true meaning of infiltration.” Swartz was facing up to 50+ years in prison and a $4 million fine after releasing pay-walled academic articles from the popular JSTOR database.
Anonymous Hacks U.S. Government Site, Threatens Supreme 'Warheads'
The hacktivist group Anonymous hacked the U.S. federal sentencing website early Saturday, using the page to make a brazen and boisterous declaration of "war" on the U.S. government.

The group claims mysterious code-based "warheads," named for each of the Supreme Court Justices, are about to be deployed. As of midnight Pacific time, the front page of Ussc.gov — the Federal agency that establishes sentencing policies and practices for the Federal courts — is filled with a long screed in green on black, together with this YouTube video: All areas of ussc.gov other than the front page appear to be functioning normally.

In other words, there's no denial of service attack or widespread vandalism.
Anonymous Goes on Megaupload Revenge Spree: DoJ, RIAA, MPAA, and Universal Music All Offline. Anonymous China Defaces, Steals Information from Almost 500 Chinese Gov/Corporate Websites. (Source: ibnlive.in.com) Anonymous China declares war on Chinese government for Internet censorship The Chinese government was recently targeted by newly formed Anonymous China, where nearly 500 websites were hit.

Operation Darknet Tuesday, after hacking into Lolita City, a darknet website used by pedophiles to trade in child pornography, Anonymous released usernames and other information of 1,589 pedophiles trading in kiddie porn. A darknet website is a closed private network of computers used for file sharing.
Anonymous: From the Lulz to Collective Action. Taken as a whole, Anonymous resists straightforward definition as it is a name currently called into being to coordinate a range of disconnected actions, from trolling to political protests.

Originally a name used to coordinate Internet pranks, in the winter of 2008 some wings of Anonymous also became political, focusing on protesting the abuses of the Church of Scientology. By September 2010 another distinct political arm emerged as Operation Payback and did so to protest the Motion Picture Association of America (MPAA), and a few months later this arm shifted its energies to Wikileaks, as did much of the world's attention. It was this manifestation of Anonymous that garnered substantial media coverage due the spectacular waves of distributed denial of service (DDoS) attacks they launched (against PayPal and Mastercard in support of Wikileaks).
‘Anonymous’ Forces 40+ Child Pornography Sites Offline. Anonymous has turned its attentions from corporations to pedophiles with the news that the hacktivist group has taken down multiple child pornography sites, including one of the largest known, with account details of its 1589 users being posted online as evidence.

The incident was just part of something Anonymous is calling “Operation Darknet,” a move by the group to eliminate child pornography on the Tor network. Tor, which was originally developed as a way of protecting government communications by the U.S. Navy, now describes itself as “a network of virtual tunnels that allows people and groups to improve their privacy and security on the Internet.”
Anonymous And The War Over The Internet. This article is the first in a two-part series tracing the development of the amorphous online community known as Anonymous, pranksters who have become a force in global affairs.

Late in the afternoon of Jan. 19, the U.S. Department of Justice website vanished from the Internet. Anyone attempting to visit it to report a crime or submit a complaint received a message saying the site was unable to load. More websites disappeared in rapid succession. The Recording Industry Association of America.
AnonNews.org : Everything Anonymous. Les Anonymous dans l’agenda politique. LNN - Breaking News & Video News. Anonymous (group)
Anonymous (used as a mass noun) is a loosely associated international network of activist and hacktivist entities.

A website nominally associated with the group describes it as "an internet gathering" with "a very loose and decentralized command structure that operates on ideas rather than directives". The group became known for a series of well-publicized publicity stunts and distributed denial-of-service (DDoS) attacks on government, religious, and corporate websites. Anonymous originated in 2003 on the imageboard 4chan, representing the concept of many online and offline community users simultaneously existing as an anarchic, digitized global brain.[3][4] Anonymous members (known as "Anons") can be distinguished in public by the wearing of stylised Guy Fawkes masks.[5] In its early form, the concept was adopted by a decentralized online community acting anonymously in a coordinated manner, usually toward a loosely self-agreed goal, and primarily focused on entertainment, or "lulz".